On August 4, The Dark Knight reached a $400 million domestic gross in a record time of 18 days. The previous record was held by Shrek 2, which reached it in 43 days.[3] On August 31, after 45 days in release, The Dark Knight reached $500 million domestically, becoming only the second film in history after Titanic to cross the half-billion-dollar domestic milestone, as well as the first film of the 2000s decade. Worldwide, it grossed $997 million on its initial release,[2] and an IMAX reissue[4] in 2009 saw it become the fourth film to gross $1 billion at the global box office.[5][6] For 2008, the top ten films consisted of three superhero films, three animated films, three action films and one musical film. Mamma Mia! became the highest-grossing film in UK history until it was surpassed by Avatar in 2010. In the domestic box office, 2008 came very close in passing 2007 as the highest-grossing year, falling short by just $30 million. "